Forecasters also say cold temperatures could set records in Western Washington between Wednesday and Friday. Highs Wednesday -- when the Seahawks parade in Seattle -- and Thursday are forecast in the 30s. Seattle's record low maximum for Feb. 5 is 34 (1989) and Feb. 6 is 37 (1949).

The Weather Service says the cold should start to ease by the weekend when precipitation arrives, probably starting as snow. Forecasters say temperatures should return to normal next week.